
Flagsmith is an open source feature flag and remote configuration management service for controlling feature releases across multiple
Flagsmith enables developers to create, manage, and toggle feature flags and remote configurations across web, mobile, and server applications, supporting granular user segmentation and A/B testing without redeploying code.
Updated Jun 29, 2026.
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Create and manage feature flags across web, mobile, and server-side applications to toggle features on or off without redeploying code.
Control feature flag access by environment, individual users, user segments, or percentage rollouts for practices like canary deployments.
Use multivariate flags to run precise A/B/n experiments and integrate flag data with analytics platforms for informed decision-making.
Modify application settings and feature properties like UI elements in real-time without code deployments, enabling flexible feature customization.
Supports numerous languages and frameworks including React, Node.js, Android, iOS, Flutter, Python, Ruby, .NET, PHP, and Go for seamless integration.
Open source core with options for cloud hosting, private cloud, or on-premises deployment to meet security and compliance needs.
Track all feature flag changes with audit logs and implement advanced authentication protocols including 2FA, SAML, Okta, and LDAP.
Instantly update feature flags and configurations to users without waiting for app store approvals or new deployments.
| Plan | Price | Highlights |
|---|---|---|
| Free | $0 | 50,000 API requests per month
|
| Start-Up | Contact Sales | 1,000,000 API requests per month
|
| Enterprise | Contact Sales | 5,000,000+ API requests per month
|
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